Hi folks, The recent discussions about bonding equipment together to reduce noise has prompted me to ask a question I've been mulling over for a few days now.
Should the negative side of a power supply be connected to the supply chassis (and thus to the "green wire" AC ground), or should it be left floating? I have heard arguments both for and against floating the negative terminal, mostly from the fields of industrial control and precision sensing. The gist seems to be that the negative side of power supplies are usually connected to chassis or structure ground except in cases of very sensitive analog sensing where it is sometimes left floating to help reduce noise. I've heard stories of hum in repeater systems being cured by floating the negative side of the supply. Does whether or not the negative side of the supply is floating affect the idea of bonding the rig and PS cases to a common point? 73 -- Joe KB8AP ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
